Apache and lingering close

["Arnab Ganguly" <aganguly01@xxxxxxxxx>]

Hi All,
I am getting lot of CLOSE_WAIT ,SYNC_RCV and TIME_WAIT state when I do a netstat and result it is Apache pause.
What would be the ideal approach to solve the issue.I am planning for explicit call of ap_lingering_close after reading the client request.

Also I see a #ifdef CORE_PRIVATE  under httpd_connection.h where ap_lingering_close is defined and the macro #define CORE_PRIVATE is defined in mod_proxy.h.But I don't use mod_proxy so is it going to impact anything?

For TIME_WAIT plan to reduce tcp_max_tw_buckets value.Is it going to be impacted?

For SYNC_RCV
Increasing net.ipv4.tcp_max_syn_backlog, decreasing tcp_synack_retries and enabling tcp_syncookies.

If you have any suggestion then please let me know.
Thanks in advance.

-A